Air Distributor Pump for high power air pumps, with individually controlled outlets. Our aquarium air pump accessories equipped with the flow control valve, accurately adjust the air flow, easy operation. With the splitter, you can share your air pump with few aquariums. Inlet connector Diameter: 7mm/0.3inch and the 6 OUTPUT Diameter measure 4mm/0.16inch. This fish tank air control valve is used for aquarium and aquaculture applications. Air lever valve can be connected to aquarium tubing.